Start-Up; Shut-Down; Maintenance/Servicing; Safety Notices - Andritz HP 45 Série Instructions De Service

Series HP 45
4.3

Start-up

4.3.1 Initial start-up/restarting
• Start the pump only if it is fully primed and when there is dis-
charge system pressure.
• Open the sealing and flushing valves.
• If the discharge pipework is empty:
- Close the delivery isolating valve completely before open-
ing it slightly.
- Start the pump.
- Observe the delivery pressure gauge and motor ammeter
and gradually open the discharge valve as the system
pressure increases. Take care to open the valve slowly
and not too wide.
- When the system is filled and vented check the duty point.
The pump unit may only be operated within the duty range
confirmed. We recommend to record the operation data at
the initial start-up in a protocol.
• Pumps with gland packing ring: Adjust the gland gradually
with the pump running. The packed gland must not overheat
and there should be a constant drip through the packing. Sig-
nificant initial leaking is not harmful and will be automatically
reduced as the packing swells.
4.3.2 Functional check
• Confirm that the readings of the pressure and vacuum gaug-
es and the motor ammeter, together with that of the flow me-
ter (if fitted) correspond to the data specified in the contract
documentation.
• Check the operating data at all operating states possible in
the system (parallel operation of pumps, other delivery pur-
poses, etc.)
• Record readings for future reference.
• Check the bearing temperature. A temperature of 50°C above
the ambient temperature is acceptable.
4.3.3 Closed valve operation
Never run the pump with the suction and discharge
isolating valves closed or with the discharge valve
closed at non-return valve installed at suction side.
Under such conditions the pump contents will be
rapidly vaporised and very high pressures generat-
ed. These may exceed the bursting pressure of the
pump casing, creating a serious hazard to personnel
and property.
4.4

Shut-down

4.4.1 Switching off
• Close the isolating valve in the discharge pipe.
• Switch off the pump.
• A non-return valve above which a corresponding pressure is
built by the liquid column makes the actuation of a discharge
side valve unnecessary.
• Close the additional valves.
4.4.2 Draining
• If frost is anticipated, drain any pumps or pipework not in use,
or take other precautions to prevent damage from frost.
• After pumping polluted media and to prevent corrosion when
not in use the pumps should be drained and, if necessary,
flushed.

5. Maintenance/servicing

5.1

Safety Notices

• Never work on the set until the electricity supply
has been disconnected completely. It must be im-
possible for the set to be started inadvertently.
• Always wear safety gloves when assembling/strip-
ping the pumps or when adjusting glands.
5.2

Maintenance and inspection

5.2.1 Lubricants, filling quantities and lubricating
intervals
5.2.1.1 Pump with grease lubricated bearings for
regreasing with grease nipples (standard
execution)
The bearings are filled with grease in the factory before delivery
• Need to be re-greased with approx. 20 to 30 g per point every
six months.
• Grade of grease: Lithium-based grease according to DIN
51825, non-ageing, non-acidic, non-corroding, water-resist-
ant with a working temperature of -30 to +130°C, penetration
rate of 2 to 3, working penetration of 265 to 295 and a dripping
temperature of approx. 190°C.
• Recommended commercially-available grades of grease:
- UNIREX N2, (ESSO)
- OPTIMOL OLISTA LONGTIME or OLIT 2, (OPTIMOL)
- GLISSANTO 20, (DEA)
- ENERGREASE MSLS-EP2, (BP)
• Avoid over-greasing as this can lead to damages caused by
overheating.
• After regreasing several times or if overheating occurs (50°C
above ambient) open the bearing cover and remove surplus
or used grease.
• Do not pack new bearings more than half full with clean
grease.
5.2.1.2 Pump with lubricated bearings greased for life
(special execution)
The pumps are fitted with lubricated bearings greased for life in
the factory before delivery and this should last for approx.
15,000 working hours or two years. Under unfavourable work-
ing conditions such as a hot climate, dampness or overheating,
the bearings need to be checked and changed before this peri-
od.
5.2.2 Monitoring the pump during operation
For satisfactory operation carry out the following checks as rou-
tine:
• Monitor the smooth running of the pump. In case of unusual
strong vibrations immediately switch off the unit and check for
reason (impeller damage, foreign matters, clogging, etc.)
• For pumps with gland packing confirm the leakage rate of
the shaft seal as 5 to 10 l/hr. If gland sealing water is supplied
check the flow rate.
Nominal diameter
discharge branch
32 - 65
Sealing water required
[m³/h] at Δp 0,5 bar
0.10
Table 2: Sealing water required
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